Sirius XM Radio to 100 Church?

Sirius XM Radio is setting its sights on SL Green’s 100 Church Street, potentially making it the latest in a string of Midtown media companies decamping to Lower Manhattan (see also: Conde Nast, the Daily News, National Enquirer parent company American Media). According to the Observer, Sirius is looking to take more than 250,000 square feet of office space at the building, or 180,000 square feet of contiguous space, though it’s not a done deal just yet. A major new tenant like Sirius would be a boon for SL Green, which purchased 100 Church Street, once derided as the emptiest building in Manhattan, from the Sapir Organization last January. Healthfirst signed a 172,000-square-foot lease there this past summer, infusing some life into the property but leaving 330,000 square feet still up for grabs. Newmark Knight Frank’s Brian Waterman, Jimmy Kuhn, John Fanuzzi, Hal Stein and Lance Korman are representing the landlord in its marketing efforts at the building. [NYO]